Monday, March 28, 2016

Blower Door 2

2nd Blower Door Test:

Thanks to all for the great turn out for the open house! We estimate there was about 150 people who came to check out the progress. No doubt this was a motivator for us to keep up the work and keep the blog up to date! Thank you!

After everyone left on Saturday we sealed off the open plumbing drains and the attic access hole and performed another blower door test. 


Our 1st Test Results:

  • Only the 3 1st floor southern windows were installed
  • There were zero penetrations in the zip system
  • The house volume was calculated to be:
    • RESNET, BPI and ASTM standards                                     38,698 CUFT
    • Passive House Standard                                                        27,299 CUFT
  • The Blower Door number was:
    • 83 CFM50 (we did get it down to 73 CFM50
  • The Air Changes per hour came out to:
    • 0.11 ACH50 - RESNET, BPI and ASTM standards
    • 0.16 ACH50 - Passive House Standard
Our 2nd Test Results:
  • 2 Exterior Hose Bibs have been installed
  • Multiple Electrical penetrations have been installed (including the services line)
  • All 1st and 2nd floor windows and doors are installed (except front door)
  • The outer wall assembly has been insulated with dense packed cellulose 
  • Our rain screen has been installed and taped
  • The volumes remain the same:
    • RESNET, BPI and ASTM standards                                     38,698 CUFT
    • Passive House Standard                                                        27,299 CUFT






We are still at essentially the SAME blower door number!! 
  • The Air Changes per hour came out to:
    • 0.11 ACH50 - RESNET, BPI and ASTM standards
    • 0.16 ACH50 - Passive House Standard

To put this in perspective - we have an "equivalent leakage area" of 4 square inches

We will be working this week to get the remaining above grade walls insulated with damp spray cellulose as well as the sound deadening walls. I will be posting some more on this process soon!





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